【Excellent Quality】These screw-locking carabiners are made of high-quality 304 stainless steel, rust-resistant and corrosion-resistant, suitable for all types of weather conditions. 【Locking Design】The internal thread of the stainless steel carabiner allows you to easily unscrew the hex nut with one hand to open or close the carabiner. Compared to other carabiners, our steel screw-locking carabiner prevents slipping or loosening. 【Versatile】Perfect quick link carabiner for climbing, used for chain, rope, cable connection and screw-locking door closures to increase safety. For your safety, please disable the screw lock. 【16 Safety Carabiners】Interface: 6.5 mm, inner width: 13 mm, thickness: 5 mm, outer length: 50 mm. Load capacity: 140 kg/300 lb. 【Wide Range of Applications】This locking carabiner is very suitable for boating, sailing, fishing, hiking, cycling, camping, trekking, humpback whales, padlocks, buckles, hooks, chains, keychains, accessories, utility tools, fastening tools and other equipment. (M5 stainless steel carabiner is not suitable for mountaineering)